Picking-motion for weaving-looms.



Patented May 4, 1915.

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E. ZIPPER.

PlCKlNG MOTION FOR WEAVING LOOMS.

APPLICATION FILED DEC. 2*]. 1913. 1,138,528.

wzte 5L3 9 LS THE NORRIS PETERS CO PHOTGLITHQ. WASHINGTON, D4 C- E. ZIPPER.

PICKING MOTION FOR WEAVING LOOMS.

APPLICATION FILED DEC. 27. 1913.

1,1 38,528. Patented May 4, 1915.

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*EMIL ZIPPER, or VIENNA, AUSTRIA-HUNGARY.

PICKING-MOTION non WEAVING-LOOMS.

Specification of Letters Patent.

Patented May 4, 1915.

, Application filed December 27, 1913. Serial No. 808,987.

To all whom it may concern:

Be it known that I, EMIL ZIPPER, subject of the Emperor of Austria-Hungary, residing at Vienna, Austria-Hungary, have invented certain new and useful Improve mentsin Picking-Motions for Weaving- Looms, of which the following is a specification.

The invention relates to picking motions for weaving looms, in which the picker is driven by a driving part arranged on the weaving lay or batten itself, and has for its object'a new device used for bringing the picker back to the striking position and for releasing the same for the shooting or picking, as well as devices specially designed for a picking motion of the above mentioned kind, for reducing the impact of the picker and for holding fast and releasing the shuttle.

The device for returning the driver to the striking position and for releasing the same for picking or shooting consists, according to this invention, of rotating cylinders mounted at the ends of the batten; the said cylinders are provided with a helical ledge extending over a portion of their surface for alternately returning the corresponding picker to the striking position and releasing it for the blow, and are driven by means of universal oints from any desired spindle of the weaving loom. According to this invention, the parts used for guiding the picker, are at the same time formed into a device for reducing the impact of the picker.

.For the purpose of reducing the consumption of power required during the picking, the shuttle, on reaching the shuttle box, is held fast not by parts exercising a braking action (brake jaws or the like), the pressure of which, exercised on the shuttle during the picking, causes a friction to be overcome, but by a locking lever which, as .soon as the shuttle reaches the shuttle box, engages behind its end facing the center of the loom,

and is turned positively out of the shuttle.

race before the next pick.

The accompanying drawing shows a construction according to this invention, in which the picker is operated by meansof driving springs arranged in the shuttle box, Figure 1 showing a portion of the lay or batten together with the picking motion and its driving parts, in front elevation. Fig. '2 shows the weaving loom in side elevation.

Fig. 3 shows in plan a shuttle boxtogether with the driving device- Fig. 4 is a vertical 7 longitudinal section through the shuttle box.

Figs. 5-7 are sections on lines AB, (3-D and EF of Fig. 1, seen in the direction of the arrow G of Fig. 1. l

The driving springs for operating the picker, arranged in the shuttle box, are

cocked in the construction of the drivin device shown in the drawing, during about half a revolution of the treadle shaft of the weaving loom. F orcocking and releasing the driving springs are used rotating parts arranged ,on the batten land driven fromf any rotating or oscillating part of the loom, for instance from the treadle shaft of the same. I I

In the center of the loom, between the batten supports 2, on two longitudinal girders 3, is arranged a bracket 4 in which is mounted ashort spindle 5 to which is secured a chain wheel 6.. This chain wheel 6 is driven by means of a chain 7 from a chain shuttle boxes, are connected by means of a universal joint 14, a rod 15 and a second universal joint 16, to the ends of the spindle 5, so that the rotary motion of the latter is transmitted to the spindles 13 oscillating with the batten 1. I

The shuttle box which consists of two parts 18, 19 (Figs. 3 and 5) secured together by means of bolts 17 is made cylindrical at its outer end and closed by a wall 20. In the cylindrical portion of the shuttle box is arranged a powerful spring, for instance a buffer spring 21, placed in acup 22 (Fig. 4) provided with a bolt 23 passing through the wall 20, a nut 24 being screwed on the screwthreaded end of the said bolt. In front of the spring 21 is arranged the picker 25 provided with one or more, for instance two, rods 26 engaging with perforations 27 of the shuttle box part 18, "and thus guiding the picker 25 On each of the two spindles 18 is keyed a cylinder 28,provided with a screw-.

pitch equal to zero, that is to say, normal to,

' of the screwthread 29 is situated a roller31 mounted on a bolt 32 secured to the picker 25. The shuttle box part 18 is provided on its lower face with an opening 33 (Fig. 6) through which a portion of the cylinder 28 projects into the shuttle box. In front of the cylindrical part of the shuttle box containing the spring 21 and the picker 25, the part 18 has the shape shown in Fig. 7, of a plate 37 which forms a portion of the shuttle race and is provided with two longitudinal walls 34, 35 for guiding the shuttle 36.

On the cooked pring 21 (Figs. 1, 3 and 1) being released, it drives the picker 25 together with the shuttle 36, with an increas tation of the cylinder, pushes the picker 25' by means of the roller 31 toward the end of the shuttle box, the spring 21 being thus cocked. After half a revolution of the spindle 13, the spring 21 is completely cooked and held cooked by the circular portion 30.

of the screwthread, until the roller 31 leaves the end of the latter. While the roller 31 slidesalong the circular portion 30, and during the uncocking of the spring 21, the picking motion at this side of the loom does not consume any power, the driving spring on the other side of the loom being compressed during the same time. As regards the picking motion, the loom always requires therefore the same amount of power, while the usual picking motions operated by eccentrics or cranks, require during a fraction of a second, a force greatly exceeding the average force required.

In order to prevent the picker 25 from striking with excessive violence against the plate 37 or any other stop, a dash pot may be formed by making the rods 26 to fit in an air-tight manner into the perforations 27', so that the air contained in the latter would brake the blow of the picker. The perforations 27 may also be connected to the atmospheric air by means of conduits 38 (Figs. a and 7). By turning the nut 24:, the cup 22 can be moved, so that the spring 22, according to the speed of the loom and of the picking, is more or less cocked.

In combination with the picking motion described, could be arranged in a simple manner a shuttle stopping device which is the batten itself.

not based on the principle of the shuttle braking, and is operated by the spindle 13.

This'device for avoiding the rebound of the shuttle from the picker 25, consists of a double armed locking lever 39 (Figs; 3 and 7) mounted on vertical spindle 12; the end of the said lever passing through an opening 41 in the wall 35 of the shuttle box, is normally held by a. spring-10 (Fig. 3) in the 12. After the shuttle has reached the-picker 25 brought into its outermost end position, the spring 10 turns the lever 39 behind the end'of theshuttle and thus prevents it from reb ound in g.

The spindle 412 is provided at its lower end with an arm 43 which is in the path of a projection e5 provided on a disk 4-1 mounted on the spindle 13. Immediately before the picking or shooting, the projection 15, by means of the arm 13 and. the spindle 42, turns the lever 39, in opposition to the action of thespring 40, out of the path of the shuttle, so that the latter can leave the shuttle box. After the picking, the spring 40 again turns the lever 39 into ing, the shuttle is perfectly free and can be projected from the shuttle box without having to overcome any friction (of the shuttle box tongue or. of a brake lever), as is the case in well knownshuttle braking devices. Owing to the arrangement of the whole picking motion on the lay. or batten, the reactions of the picking or shooting action are not transmitted to the frame and the other parts of the. loom, and remain limited to the batten. Owing to the adjustable braking of the picker and to alteration in the tension of the driving springs 21, the speed of the shuttle can be modified within wide limits and suited to the desired loom speed at the moment.

Picking motions which, according to this invention, are arranged completely on the batten, can be carried out in various ways different in constructive respect from the example described. Thus, the driving of the picking motion need not be effected from the treadle shaft, but canbe derived, by meansof suitable gear, from the crank shaft its initial position; At the moment of pickor any other rotating part, or finally also therein and working lengthwise thereof, an

operating'spring for said picker, a'rotatable cylinder projecting into the shuttle box and having a spiralrib for alternately releasing the picker and returning it to position in opposition to its spring, and means for operating the cylinder.

2. A picking motion for looms comprising a shuttle box, a picker wholly arranged therein and working lengthwise thereof and having a projection, an operating spring for said picker, a rotatable cylinder having a spiral rib to engage said projection and move the picker in opposition to its spring, the rib being formed to alternately release and move the picker, and means for operating the cylinder.

3. A picking motion for looms comprising a shuttle box, a picker wholly arranged therein and working lengthwise thereof and having a projection, a rotatable cylinder having a rib which extends spirally over approximately half of the cylinders circumference and at its outer end has an extension normal to the axis of the cylinder, the said rib engaging the projection and thereby moving the picker in opposition to its spring, and being formed to alternately release ancl move the picker, and means for operating the cylinder.

4. A picking motion for looms comprising a shuttle box, a picker arranged therein and working lengthwise thereof, the picker having one or more rods projecting therefrom in the direction of the movement of the picker, the shuttle box having openings in which said rods engage with dash-pot effect during the movement of the picker, a spring for operating the picker, a rotatable cylinder projecting into the shuttle box and having a spiral rib for alternately releasing the picker and returning it to normal position in opposition to its spring, and means for operating the cylinder.

5. A picking motion for looms comprising a shuttle box, a picker wholly arranged therein and working lengthwise thereof and having a projection, an operating spring for said picker, a rotatable cylinder having a spiral rib to engage said projection and move the picker in opposition to its spring, the rib being formed to alternately release and move the picker, means for operating the cylinder, comprising a shaft driven from any desired shaft of the loom, a rod transmitting the motion of said driven shaft to said cylinder, and universal joint connecmove the picker in opposition to its spring,

the rib being formed to alternately release and move the picker, means for operating the cylinder, a spring-operated shuttle lock arranged to yield to permit the movement of .a shuttle into a shuttle box and after the passage of said shuttle thereby to positively lock the shuttle against re-bound, and means for positively operating the shuttle lock to release the shuttle at the moment of the operation of said picker by its spring.

7. A picking motion for looms comprising a shuttle box, a picker wholly arranged therein and working lengthwise thereof and having a projection, an operating spring for said picker, a rotatable cylinder having a spiral rib to engage said projection and move the picker in opposition to its spring, the rib being formed to alternately release and move the picker, a pivotally mounted spring-held shuttle locking arm'combined with the shuttle box and arranged to yield to permit the movement of a shuttle into a shuttle box and after the passage of said shuttle thereby to positively lock the shuttle against rebound, and means for positively operating the shuttle lock to release the shuttle at the moment of the operation of said pickers by its spring, comprising an arm mounted on the spindle of said locking arm, and a disk rotatable with said cylinder and having a projection to engage said lastnamed arm.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

EMIL ZIPPER. Witnesses:

J osnr RUBARCHE, AUGUST FUGGER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

